Abstract
The aim of the present study was to evaluate the usefulness of positioning the instillation of contrast at the ureteral orifice (PIC) cystography in prediction of postoperative contralateral reflux in patients with unilateral vesicoureteral reflux (VUR) undergoing ureteral reimplantation. Between January 2007 and March 2009, 34 children (20 boys and 14 girls) had antireflux surgery for unilateral primary VUR. This was diagnosed by conventional fluoroscopic voiding cystourethrography (VCUG) in all patients. After induction of general anesthesia, PIC cystography was carried out immediately before ureteral reimplantation by instilling contrast material at the ureteral orifice. Patients with positive PIC cystogram on the contralateral side underwent bilateral ureteral reimplantation via the Cohen technique. VCUG was repeated at 6-12 months postoperatively. Of the 34 patients, 16 (47%) showed VUR on the contralateral side on PIC cystography and underwent bilateral reimplantation. The remaining 18 patients (53%) with negative PIC cystogram underwent unilateral reimplantation, and no VUR was detected by postoperative VCUG in all ureters. None of the 34 patients had surgical complications or recurrent urinary tract infections. In conclusion, PIC cystography represents a useful tool to predict new onset contralateral VUR in patients with unilateral VUR on conventional VCUG.
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